thanks - a mixed response then
The shapes of the first two are to be seen in Hajdamach's illustration showing the Webb catalogue page for Gay Glass (1930's?), so on that basis are possible contenders for 'Evergreen', and the Backstamp for both is dated by Dodsworth to c. 1935 - 49 - so at least in the right area date wise for Gay Glass. Based on their backstamps, my pieces are potentially pre-war - but can't, of course, be sure.
As I've said, I'm confident that the dull glow from these first two pieces is simply the result of the presence of manganese.
When speaking of the three colours of Gay Glass, Hajdamach comments quite specifically about 'Sunshine'....... "......the Golden Amber which contained an appreciable amount of uranium......." - but makes no mention of either 'Spring' or 'Evergreen' containing uranium - thus implying they didn't??? Because of these several shades of green from Webb, pictures in books are an not always a reliable guide with which to be dogmatic about provenance, and I think what I was trying to say (to those folk who do have some 'Evergreen') was - 'does the green of these first two pieces look like the green of 'Evergreen'
If it's not too much trouble may I ask both David and Keith to post a pic of a piece of what they consider to be Webb's 'Evergreen, and to re-check with the torch re the matter of either uranium or manganese. Thanks very much